JP2009024672A - Inner hose and reserve tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner hose and a reserve tank preventing block of a flow passage. <P>SOLUTION: The inner hose is installed to a tank 10 having a tank body 11 storing liquid. One end part 14a of the inner hose communicates with the liquid stored in the tank body 11, and the other end part 14b thereof communicates with the outside of the tank body 11. A flow passage 22 flowing the liquid between the tank body 11 and the outside 5 is formed in the hose body 21, and block prevention means 23a, 23b, 25 preventing block of the flow passage 22 by an inner face 11a of the tank body 11 is formed to one end part 14a of which tip has a flow passage opening face 23 as an opening face of the flow passage 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inner hose and a reserve tank.

Conventionally, in a vehicle having a water-cooled internal combustion engine, a reserve tank for storing cooling water overflowing from a radiator is installed. This type of reserve tank is composed of a tank body and a cap, as described in Patent Document 1, for example, and an L-shaped inner hose made of rubber is integrally formed on the cap. Yes. The inner hose is disposed so that one end side communicates with the cooling water inside the tank body and the other end side is connected to the radiator side. And the flow-path opening surface (surface immersed in cooling water inside a tank main body) of the one end side has comprised the flat shape cut | disconnected at right angles to the axial direction of the hose.
Japanese Patent Laid-Open No. 2007-23787

  Usually, the length of the inner hose is set so that the flow path opening surface is positioned below the LOW line indicating the lower limit value of the cooling water storage level in accordance with the vertical length of the tank body.

  However, since the inner hose can be elastically deformed, the channel opening surface is kinked against the inner wall surface of the tank body, and the shape of the tank body varies, so depending on the shape of the tank body, the inner bottom surface ( For example, there is a step on the inner bottom surface, which may hit the higher surface. At this time, if the flow path opening surface is formed as a flat surface orthogonal to the axial direction of the hose, there is a problem that the flow path opening surface is in close contact with the inner wall surface of the tank body and the flow path is blocked. It was happening.

  If the flow path is blocked, smooth circulation of the cooling water is hindered and the reserve tank may malfunction.

  An object of this invention is to provide the inner hose and reserve tank which can prevent the obstruction | occlusion of a flow path in view of the said problem.

  In order to achieve the above object, the present invention employs the following technical means.

  In the first aspect of the invention, the tank (10) having the tank main body (11) for storing the liquid is provided, and the one end (14a) communicates with the liquid stored in the tank main body (11). An end hose (14b) is an inner hose arranged so as to communicate with the outside of the tank body (11), and liquid is supplied to the tank body (11), the outside (5), and the hose body (21). A flow path (22) is formed between the first end (14a) and a flow path opening surface (23) that is an opening surface of the flow path (22) is formed at the tip. Blocking prevention means (23a, 23b, 25) for preventing the passage (22) from being blocked by the inner surface (11a) of the tank body (11) is formed.

  According to this configuration, even when the flow path opening surface (23) hits the inner surface (11a) (the inner wall surface or the inner bottom surface) of the tank body (11), the blockage prevention means (23a, 23b, 25) It is possible to prevent the passage (22) from being blocked.

  In the invention according to claim 2, the blocking prevention means (23a, 23b, 25) is such that the flow path opening surface (23) has different inclination angles (θ1, θ2) with respect to the axial direction of the hose body (21). It is characterized by having a plurality of planes (23a, 23b).

  According to this configuration, of the plurality of planes (23a, 23b) of the flow path opening surface (23), the plane that does not contact the inner surface (11a) of the tank body (11), or between each plane Since the circulation of the liquid is ensured in the formed gap, the blockage of the flow path (22) can be suitably prevented.

  In the invention according to claim 3, the flow path opening surface (23) is inclined with respect to the axial direction of the hose body (21) by forming the tip of the one end (14a) into a V shape. It is configured to have a plurality of planes (23a, 23b) having different θ1, θ2).

  According to this configuration, an inner hose in which the blockage of the flow path is prevented can be easily manufactured by cutting a normal hose having a flat front end surface with, for example, scissors for V-shaped cutting.

  In the invention described in claim 4, the blocking prevention means (23a, 23b, 25) includes at least a through hole (25) formed through one end (14a) of the hose body (21). It is characterized by that.

  For example, in an inner hose having a channel opening surface (26) cut at right angles to the axial direction of the hose body (21), the channel opening surface (26) is formed on the inner wall surface (inner surface 11a) of the tank body (21). Even if it hits (contacts), the cooling water can be circulated through the through hole (25). Therefore, the flow path (22) is not blocked. In addition, the effect of combining the tip shape having a plurality of planes (23a, 23b) with different inclination angles (θ1, θ2) and the through hole (25) is further ensured.

  In the invention according to claim 5, the tank (10) is a reserve tank for storing cooling water overflowing from the radiator (5) for the engine, and has an opening formed in the upper part of the tank body (11). It is provided in a cap (12) that closes the inlet, and the cooling water is circulated between the tank body (11) and the radiator (5).

  According to this configuration, in the reserve tank (10), for example, when the cap (12) is once removed from the tank main body (11) and reattached, the flow path opening surface (23) of the inner hose becomes the tank main body. Even when it hits the inner surface (11a) of (11), the blockage of the flow path (22) can be prevented.

  In invention of Claim 6, the tank main body (11) which stores the cooling water which overflowed from the radiator (5) for engines, and the inlet formed in the upper part of a tank main body (11) are obstruct | occluded, A cap (12) provided with the inner hose (14A, 14B) according to claim 5 is provided.

  According to this structure, since the flow path (22) does not block in the inner hoses (14A, 14B), it is possible to prevent the radiator (5) from malfunctioning.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.

(First embodiment)
FIG. 1 is a schematic diagram showing a cooling apparatus 1 for an internal combustion engine for a vehicle to which a reserve tank 10 according to a first embodiment is applied.

  As shown in FIG. 1, the reserve tank 10 is mounted on a vehicle engine cooling device 1 for cooling a water-cooled internal combustion engine (hereinafter referred to as an engine) 2 to an appropriate temperature. The vehicle engine cooling device 1 includes an engine 2, a water pump 3, a thermostat 4, a radiator 5, and the like that are connected in a ring shape to form a cooling water circulation circuit.

  The thermostat 4 is a flow rate adjusting valve that maintains the temperature of the engine 2 within a predetermined temperature range by adjusting the amount of engine cooling water that flows to the radiator 5. The radiator 5 supplies the engine cooling water circulated through the engine 2 and the outside air. It is a heat exchanger that cools engine coolant by exchanging heat.

  The thermostat 4 and the inlet of the water pump 3 are communicated by a suction pipe 6. Further, a bypass pipe 7 is provided between the thermostat 4 and the engine 2 for bypassing the cooling water from the radiator 5 when the cooling water of the engine 2 is at a low temperature equal to or lower than a predetermined temperature.

  The system pressure in the vehicular engine cooling device 1 is set to a predetermined value by a pressurizing cap 5b as a pressure adjusting plug attached to the upper end portion of the upper tank 5a of the radiator 5.

  The reserve tank 10 is connected to the upper tank 5a of the radiator 5 via the hose 8 and the pressure cap 5b. When the system pressure exceeds a predetermined value, the cooling water opens the pressurization valve in the pressurization cap 5 b to leak from the radiator 5 and is stored in the reserve tank 10. And when the said system | strain pressure becomes below a predetermined value, the negative pressure valve in the pressurization cap 5b is opened, and the cooling water stored in the reserve tank 10 is returned to the radiator 5. FIG.

  Next, the reserve tank 10 will be described. The reserve tank 10 includes a tank body 11 that stores cooling water, and a cap 12 that closes a cooling water inlet (not shown) formed in an upper portion of the tank body 11.

  The cap 12 is formed of a resin material such as polypropylene, and includes a substantially circular lid 13 that closes the water inlet, an inner hose 14 </ b> A as a connection hose, and an overflow pipe 15. The inner hose 14A is provided through the lid 13 of the cap 12 so that one end portion (lower end portion 14a) communicates with the inside of the tank body 11 (soaked in the liquid), and the other end portion ( The upper end part 14 b) is formed in a bent tubular shape so as to face the radiator 5, and is connected to the hose 8 of the radiator 5.

  The overflow pipe 15 communicates with the atmosphere to open the tank body 11 to the atmosphere.

  In addition, the cap 12, the cap body 13, the inner hose 14A, and the overflow pipe 15 are integrally formed by resin molding.

  The tank body 11 is a substantially hollow container formed of a resin material such as polypropylene, and is formed by blow molding or the like. Further, on the side surface of the tank main body 11, “LOW” indicating a low level line and “HIGH” indicating a high level line of the storage amount of the cooling water are displayed by a raised display or the like.

  The length of the inner hose 14A is set so that the lower end portion 14a is positioned between the inner bottom surface of the tank body 11 and the low level line LOW when the inner hose 14A hangs down inside the tank body 11. Yes.

  Next, the lower end shape of the inner hose 14A, which is a main part of the present invention, will be described. FIG. 2 is an enlarged view showing a lower end portion 14a of the inner hose 14A (a portion surrounded by a two-dot chain line in FIG. 1). As shown in FIG. 2, a flow path 22 is formed in the hose body 21 of the inner hose 14A. The flow path opening surface 23, which is the surface where the flow path 22 is opened at the lower end portion 14a of the inner hose 14A, is inclined with respect to the axial direction of the hose body 21 (the vertical direction indicated by the arrow in FIG. 2) (θ1, θ2 ) Having a plurality of (two in the present embodiment) planes (first plane 23a, second plane 23b) (blocking prevention means).

  In the present embodiment, the inclination angle θ1 of the first plane 23a is 45 degrees, the inclination angle θ2 of the second plane 23b is 135 degrees, and the lower end portion 14a of the inner hose 14A is a non-flat shape that is V-shaped when viewed from the side. Is formed.

  The inner hose 14A is manufactured by vulcanization molding, and the lower end V-shape is formed by cutting with scissors for V-cut.

  The reserve tank 10 including the inner hose 14A configured as described above has the following operational effects.

  For example, when the cap 12 is once removed and reattached for cooling water replenishment, the inner hose 14A is kinked from the normal initial installation position and the flow path opening surface 23 hits the inner wall surface (inner surface 11a) of the reserve tank 10. Even in this case, since the channel opening surface 23 is not flat, at least one of the two planes 23a and 23b constituting the channel opening surface 23 prevents the channel 22 from being blocked. The

  Alternatively, even if the inner hose 14A that is too long for the tank body 11 is accidentally attached, even if the lower end portion 14a of the inner hose 14A hits the inner bottom surface (the inner surface 11a) of the tank body 11, Similarly, blockage of the flow path 22 is prevented.

  In other words, since the flow path 22 is not blocked, the function of the reserve tank 10 can be maintained well, and the radiator 5 can be prevented from malfunctioning.

  Moreover, since the shape of the lower end part 14a of the inner hose 14A of this embodiment can be formed only by cutting once with scissors for V-shaped cutting, manufacture is easy.

(Second Embodiment)
FIG. 3 is an enlarged view showing the lower end portion 14a of the inner hose 14B in the second embodiment of the present invention, and FIG. 4 is a cross-sectional view showing the IV-IV portion in FIG. In the present embodiment, the same reference numerals as those in the first embodiment are attached to the constituent members common to the first embodiment, and the following description will be made by paying attention to the differences from the first embodiment. And

  As shown in FIGS. 3 and 4, one circular through hole 25 (blocking prevention means) penetrates the hose body 21 from the outside to the flow path 22 at the lower end portion 14a of the inner hose 14B of the present embodiment. Have been drilled. That is, the through hole 25 communicates with the flow path 22. The through hole 25 is located in the vicinity of the lowermost surface (the channel opening surface 26) of the inner hose 14B in the lower end portion 14a, and is formed by drilling or pressing. Unlike the first embodiment, the flow path opening surface 26 is formed as a flat surface cut at right angles to the axial direction (vertical direction) of the hose body 21.

  According to this embodiment, when the inner hose 14 </ b> B is attached to the tank body 11, the through hole 25 formed near the lowermost surface (flow path opening surface 26) is located below the low level line LOW of the tank body 11. . Therefore, as described above, even if the flow path opening surface 26 is closed when the inner hose 14B is kinked or too long and hits the inner surface 11a of the tank body 11, the flow path 22 is connected via the through hole 25. And the cooling water are in communication with each other.

  Therefore, similar to the first embodiment, the blockage of the flow path 22 can be prevented. Also in the present embodiment, since it is only necessary to form the through hole 25, the manufacturing is easy.

(Other embodiments)
In the above embodiments, the shape of the substantially hollow container of the tank body 11 is a substantially cubic shape, but may be other shapes such as a substantially cylindrical shape such as an ellipse.

  In the inner hose 14A of the first embodiment, the lower end is V-shaped, but may be formed as an inverted V-shaped inner hose 14C as shown in FIG. According to this embodiment, even when the flow path opening surface 27 comes into contact with the inner surface 11a of the tank body 11, a gap is formed between the first plane 27a and the second plane 27b. Cooling water can be circulated.

  Moreover, as shown in FIG. 6, you may form as W-shaped inner hose 14D. In addition, various forms are possible as long as they are configured by a plurality of planes having different inclination angles, such as a part of an arc, a trapezoid, a semicircle, and a wave shape. Even in this case, the flow path 22 can be prevented from being blocked by a flat surface that does not come into contact with the inner surface 11a or a gap between the flat surfaces.

  In the said 2nd Embodiment, although the flow-path opening surface 26 in the lower end part 14a of the inner hose 14B was formed as a flat surface, an inclination angle differs with respect to the axial direction of the hose main body 21 like 1st Embodiment. It is good also as a structure which has several plane 23a, 23b. That is, it may be implemented as a combination having the through hole 25 and the flat surfaces 23a and 23b (or the other embodiments described above) having different inclination angles θ1 and θ2. In this case, it is possible to reduce the possibility that the flow path 22 is blocked more reliably.

  Although the single through hole 25 is formed in the second embodiment, a plurality of through holes 25 may be provided. Further, the shape is not limited to a circular shape, and various shapes are possible.

  In each of the above embodiments, the inner hoses 14A and 14B of the present invention are applied to the reserve tank 10 of the radiator 5. However, in addition to the reserve tank 10, it may be applied to other tanks such as a washer tank and a brake oil tank. In this case, the liquid stored in the tank body 11 is not limited to engine cooling water.

It is a schematic diagram which shows the cooling device of the internal combustion engine for vehicles to which the reserve tank of 1st Embodiment of this invention is applied. It is an enlarged view which shows the lower end part of the inner hose of 1st Embodiment. It is an enlarged view which shows the lower end of the inner hose in 2nd Embodiment of this invention. It is sectional drawing which shows the IV-IV part in FIG. It is an enlarged view which shows the lower end part of the inner hose in other embodiment. It is an enlarged view which shows the lower end part of the inner hose in other embodiment.

Explanation of symbols

5 Radiator (external)
DESCRIPTION OF SYMBOLS 10 Reserve tank 11 Tank main body 11a Inner surface 12 Cap 14A, 14B Inner hose 14a Lower end part (one end part)
14b Upper end (other end)
21 hose body 22 channel 23 channel opening surface 23a first plane (channel opening surface, blocking prevention means)
23b Second plane (channel opening surface, blocking prevention means)
25 Through hole (blocking prevention means)
θ1, θ2 tilt angle

Claims (6)

Provided in a tank (10) having a tank body (11) for storing liquid;
An inner hose disposed so that one end (14a) communicates with the liquid stored in the tank body (11) and the other end (14b) communicates with the outside of the tank body (11). There,
A flow path (22) for allowing the liquid to flow between the tank main body (11) and the outside (5) is formed inside the hose main body (21), and the flow path (22) is formed at the tip. The one end portion (14a) where the flow passage opening surface (23), which is the opening surface of the tank, is formed is prevented from being blocked by the inner surface (11a) of the tank body (11). The inner hose is characterized by being formed with blocking prevention means (23a, 23b, 25).   The blockage preventing means (23a, 23b, 25) includes a plurality of flat surfaces (23a, 23) in which the flow path opening surface (23) has different inclination angles (θ1, θ2) with respect to the axial direction of the hose body (21). 23. The inner hose according to claim 1, wherein the inner hose is configured by having 23b).   By forming the distal end shape of the one end portion (14a) into a V shape, the flow path opening surface (23) has different inclination angles (θ1, θ2) with respect to the axial direction of the hose body (21). The inner hose according to claim 2, wherein the inner hose is configured to have a plurality of planes (23a, 23b).   The blocking prevention means (23a, 23b, 25) includes at least a through hole (25) formed through the one end (14a) of the hose body (21). The inner hose according to any one of claims 1 to 3. The tank (10) is a reserve tank for storing cooling water overflowing from the engine radiator (5),
Provided in a cap (12) for closing an inlet formed in an upper part of the tank body (11), and allowing the cooling water to flow between the tank body (11) and the radiator (5). The inner hose according to any one of claims 1 to 4, wherein the inner hose is characterized. A tank body (11) for storing cooling water overflowing from the engine radiator (5);
A reserve tank comprising: a cap (12) provided with an inner hose (14A, 14B) according to claim 5, which closes an inlet formed in an upper portion of the tank body (11).

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